10 gal is far to small as every one has stated i have mine in a 40 and that is far to small i will admit. I think the right size is around 80 and 100 gal they do need a lot of space. I plan on getting something that size once my other bullfrogs start getting larger. The more space you have the better for these guys. If you have to small of a tank your frog will become obese and unproportionate such as have small skinny legs with a large body. thus far i have not had this problem but i have to be extra careful because my frog is currently becoming obese. i have stopped the once a month feeding of rodents due to this problem and have had to cut down on the roaches too. they will become abese for a number of reasons such as over feeding or high fat foods but also lack of room to move about will also cause this i am finding out. my frog is pushing 7" vent to snout right now.